EP2676349A1 - Ladegerät für einen akkumulator - Google Patents
Ladegerät für einen akkumulatorInfo
- Publication number
- EP2676349A1 EP2676349A1 EP12700616.1A EP12700616A EP2676349A1 EP 2676349 A1 EP2676349 A1 EP 2676349A1 EP 12700616 A EP12700616 A EP 12700616A EP 2676349 A1 EP2676349 A1 EP 2676349A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- battery cell
- switch
- charger according
- voltage value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
- H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
- H02J7/54—Passive balancing, e.g. using resistors or parallel MOSFETs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
- H02J7/82—Control of state of charge [SOC]
Definitions
- the invention relates to a charger for a rechargeable battery.
- energy storage devices have battery cells connected in series, with the energy storage device being common to charge the energy storage device
- the invention is therefore the object of developing a charger for an accumulator, the environmental protection should be improved.
- the charger for an accumulator which has serially connected Akkuzellen, is provided with an arrangement for controlling the charging current for a battery cell, the arrangement having a controllable switch, with which the charging current at the Battery cell is adoptedleitbar, in particular as a bypass current, wherein a means for comparing a first, the voltage applied to the battery cell voltage value is provided with a reference voltage value whose output signal is supplied to the controllable switch and also a galvanically isolated signaling channel, via which an analog value is transferable.
- each battery cell such an arrangement for bypass current management can be assigned. In this way, the charging current to the battery cell can be guided when it is charged.
- the battery cell is protectable from overcharging and thus extends the life, which improves the environment by the thus caused lower material consumption.
- the charging voltage or battery voltage is compared with a critical value, which would result in overcharging.
- it is compared with a nominal voltage, below which the charging current in the battery cell and when exceeded the charging current is passed to the battery cell.
- a means for comparing a second, the voltage applied to the battery cell voltage value is provided with a critical voltage value whose output signal is a galvanically isolated
- the first and the second voltage value are generated by a voltage divider which can be fine-tuned, in particular by
- Overvoltage can be specified in a simple manner. In particular, only a single one has to
- Fine-tuning and not two fine-tuning are fine-tuning and not two fine-tuning.
- the signaling channels form an analog two-wire signaling bus, in particular so are guided on a same bus channel.
- the advantage here is that a little complicated message bus is created, the state of charge can be represented by the effective made by the respective arrangement on the bus resistance The higher-level control is thus able to determine the state of charge from the total resistance on the bus and according to the Control charging current.
- a resistor is applied between the two lines of the two-wire bus, in particular by means of a galvanically separated switch, in particular an optocoupler.
- the switch is thermally conductively connected to such a large heat sink, that the bypass current is permanently and interrupted, in particular more than an hour, can be derived by the switch.
- the advantage here is that a powerful switch is used.
- a metallic surface of a printed circuit board, on which the switch is equipped acts as a heat sink for the switch.
- the advantage here is that no additional heat sink is necessary.
- Important features in the arrangement for deriving charging current of a battery cell of an energy store, in particular balancer circuit, by a controllable switch are that a means for comparing a first, the voltage applied to the battery cell voltage value with a reference voltage value
- the Aüsgangssignal as a drive signal to the controllable switch and also a galvanically isolated signaling channel, via which an analog value can be transmitted.
- each battery cell a Balancerscnies is assigned.
- Another advantage is that the Balancerscnies is not to address and thus a small
- FIG. 1 shows a balancing circuit for a battery cell.
- the positive pole and the negative pole of the battery cell are connected on the input side to the balancer circuit.
- the input side of the balancer circuit can be short-circuited by means of the switch S1 via the diode D1.
- the switch is designed as a power semiconductor switch, which is connected to a sufficiently large heat sink, so that even with a short-circuited switch, the flowing charging current causes no destruction of the switch.
- the energy store has a total of a plurality of battery cells connected in series, which in each case a balancer circuit according to Figure 1 is connected in parallel.
- Voltage divider (R1, R3, R4, R5) is arranged, wherein the resistor R1 is fine-tuned by a resistor R2 connected in parallel, so that the desired
- Voltage division is achieved with high accuracy.
- the voltage divider generates two voltages which are kept apart from one another by a voltage difference substantially determined by R4. Thus, if the resistance of the parallel connection of R1 and R2 is changed during the fine adjustment, the two output voltages of the voltage divider change, but the voltage difference between them remains essentially the same.
- the first of the generated voltages is supplied to a comparator OP1, which compares these with a reference voltage generated by a reference voltage generating means 2.
- This means 2 is preferably designed temperature-compensated, so that the reference voltage is generated substantially independently of the ambient temperature of the means 2.
- the output signal is also supplied to an optocoupler from the comparator OP1, the otherwise an inhibited resistor R7 between the lines X1 / 1 and X2 / 2 Zweileiterbusses, so two-wire bus, take effect, in particular so this connects, so that the resistance with his The first connection is connected to line X1 / 1 and connected to its second connection on line X1 / 2.
- the other balancer circuits are designed according to the one shown in FIG.
- their resistors R7 are also effectively feasible in a corresponding manner by means of corresponding optocouplers OP2.
- all first connections are connected by means of the line X1 / 1, and all second connections by means of the line X1 / 2.
- the resistors are connected in parallel and the effective resistance between the two lines is getting smaller the more battery cells are charged.
- a voltage between the lines X1 / 1 and X1 / 2 can be applied and thus driven current value in Zweileiterbus (X1 / 1, X1 / 2) detectable. From the current value, a state of charge can be determined.
- the second of the generated voltages preferably the lower of the generated ones
- Voltages are supplied to a comparator OP2 which compares them with the reference voltage generated by the reference voltage generating means 2.
- a reaching of a critical voltage value can be detected and, when exceeded, instead of an otherwise generated LOW signal, a high signal is generated, which is passed to an optocoupler which electrically isolates this signal to a two-wire bus, which lines X1 / 1 and X2 / 2, passes.
- an optocoupler which electrically isolates this signal to a two-wire bus, which lines X1 / 1 and X2 / 2, passes.
- FIG. 1 when a high signal is applied to the primary side of the optocoupler, a LOW signal is relayed to the secondary side, in that the lines X1 / 1 and X2 / 2 of the two-wire bus are short-circuited.
- this relaying can be carried out in an analogous manner with little effort, for which purpose a voltage is applied between the two lines of the two-wire bus and the thus caused current value in the two-wire bus is determined. Above a first critical current value, a short circuit is detected. Below this critical value, the current value corresponds to the state of charge of the energy store.
- a means 1 for undervoltage detection is arranged so that in case of failure of the input side Akkuzellschreib or falls below a critical
- FIG. 2 shows in more detail how the two-line bus summarizes the messages of the balancer circuits in an analogous manner and makes them detectable:
- a constant supply voltage of, for example, 10 volts is applied, wherein a current-limiting resistor R20
- the comparison means 21 is thus detected by arrangement of Figure 2 by the voltage applied to the comparison means, whether one, two or more Balancerscillesen the respective resistor R7 have made effective or a short circuit, so the fault message, or no Balancerscnies is active.
- the higher-level unit therefore does not detect any current. in Zweileiterbus but divided depending on the number of resistors R7 made effective voltage.
- the comparison means 21 can also be realized as an analog voltage input of an A / D converter, in which case the applied voltage is compared with critical analog values.
- the resistors of the balancer circuits can also be connected in series by connecting a respective X 1/1 terminal of a balancer circuit to the X1 / 2 terminal of a next-following balancer circuit.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011011429A DE102011011429B4 (de) | 2011-02-16 | 2011-02-16 | Ladegerät für einen Akkumulator |
| PCT/EP2012/000211 WO2012110186A1 (de) | 2011-02-16 | 2012-01-18 | Ladegerät für einen akkumulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2676349A1 true EP2676349A1 (de) | 2013-12-25 |
| EP2676349B1 EP2676349B1 (de) | 2018-10-31 |
Family
ID=45509452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12700616.1A Active EP2676349B1 (de) | 2011-02-16 | 2012-01-18 | Ladegerät für einen akkumulator |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2676349B1 (de) |
| DE (1) | DE102011011429B4 (de) |
| WO (1) | WO2012110186A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4238721A (en) * | 1979-02-06 | 1980-12-09 | The United States Of America As Represented By The United States Department Of Energy | System and method for charging electrochemical cells in series |
| JPH10191574A (ja) * | 1996-12-26 | 1998-07-21 | Japan Tobacco Inc | 充電装置 |
| US5965996A (en) * | 1997-12-11 | 1999-10-12 | Vectrix Corporation | Electrical scooter having an equalization circuit for charging multiple batteries |
| US6316917B1 (en) * | 1999-03-09 | 2001-11-13 | Asahi Glass Company, Limited | Apparatus having plural electric double layer capacitors and method for adjusting voltages of the capacitors |
| US6417646B1 (en) * | 2001-05-22 | 2002-07-09 | Honeywell International Inc. | Circuit for monitoring cells of a multi-cell battery during charge |
| US6844704B2 (en) * | 2001-10-04 | 2005-01-18 | Ise Corp. | Voltage threshold device and energy storage cell failure detection system for power supply |
| JP4535938B2 (ja) * | 2005-05-27 | 2010-09-01 | 株式会社リコー | キャパシタ電源装置,加熱装置,画像形成装置および複写装置 |
| AU2008201759A1 (en) * | 2007-04-24 | 2008-11-13 | Dilkes, Rodney Colin Lawton Mr | Fail safe battery management system |
-
2011
- 2011-02-16 DE DE102011011429A patent/DE102011011429B4/de active Active
-
2012
- 2012-01-18 EP EP12700616.1A patent/EP2676349B1/de active Active
- 2012-01-18 WO PCT/EP2012/000211 patent/WO2012110186A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012110186A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011011429B4 (de) | 2013-05-23 |
| EP2676349B1 (de) | 2018-10-31 |
| DE102011011429A1 (de) | 2012-08-16 |
| WO2012110186A1 (de) | 2012-08-23 |
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